Magillicutty Gang

The Magillicutty Gang are supposed to be actors posing as train robbers on the last run of an antique steam train in "The Last Ride of the Dodge City Rambler". However, they turn out to be real hijackers, intent of destroying the train and the headquarters of the railroad company that cheated their ancestor.

When Stan leaves the train in an effort to avoid Francine's Aunt Karen, the engineer is shot and dies in his arms, and he realizes the 'train robbers' are real. As Stan sets out in pursuit, the hijackers find they have a dilemma, that without the engineer, they have no one that knows how to operate the train. But when they overhear Steve spouting facts he learned from a book, they trick him into running it for them. Stan catches up, but Francine refuses to listen to him. Stepping between cars to ponder his next move, he discusses his dilemma with a stranger who turns out to be a gang member and knocks him out. When he comes to, he finds he's been chained up and the gang intends to ram the train into the railroad headquarters. Even worse, they chain Aunt Karen up with him.

After gang leader Clint tells Stan of their plans and backstory, they leave to prepare, with Donald not thrilled that it is a suicide mission. Stan uses Karen's oxygen tank to make a blow torch to cut their chains. With a marble from a bag that Stan picked up when he left the train and Karen's oxygen tank, they place the tank at the edge of the firebox and uncouple the cars, hoping to use the marble to knock the tank in once they are clear. Unfortunately, the family distracts them at the critical moment and Stan can no longer take the shot. However, Aunt Karen takes the marble and makes the shot, blowing up the train and Clint who was riding on top of it just before it crashes into the railroad headquarters as the passenger cars slow to a stop and the remaining robbers are arrested.